C280-08 Tier 4 Engine Manifold (Diesel Exhaust Fluid) - Remove and Install Caterpillar


Manifold (Diesel Exhaust Fluid) - Remove and Install
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1.1. Removal Procedure
2.1. Installation Procedure

Removal Procedure

Table 1
Required Tools 
Tool  Part Number   Part Description  Qty 
207-1601  Rubber Lubricant 
Loctite 536 Low Break-loose PST Pipe Sealant 


NOTICE

Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.

Refer to Special Publication, NENG2500, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat products.

Dispose of all fluids according to local regulations and mandates.


  1. Turn off the diesel exhaust fluid supply to the dosing cabinet.

  2. Turn off the power supply to the dosing cabinet.

  3. Wait 30 seconds, then turn off the air supply to the dosing cabinet.

  4. Disconnect the diesel exhaust fluid supply from the diesel exhaust fluid screen.

  5. Disconnect the diesel exhaust fluid injection line.


    Illustration 1g03506145


    Illustration 2g03506275

  6. Remove front panel (1) and panel (2).


    Illustration 3g03506282


    Illustration 4g03506284

  7. Disconnect harness assemblies (3) and (4).


    Illustration 5g03506286


    Illustration 6g03506287

  8. Disconnect harness assemblies (5) and (6).


    Illustration 7g03506320

  9. Disconnect tube assemblies (7) and (8).

  10. Remove bolts (9) and remove diesel exhaust fluid manifold (10).


    Illustration 8g03506329

  11. Remove diesel exhaust fluid screen (11).


    Illustration 9g03506392


    Illustration 10g03506487

  12. Remove solenoid (12). Remove O-ring seals (13).


    Illustration 11g03506393


    Illustration 12g03506493

  13. Remove adapter (14). Remove O-ring seal (15).


    Illustration 13g03506394


    Illustration 14g03505591

  14. Remove plug (16). Remove O-ring seal (17).


    Illustration 15g03506395


    Illustration 16g03506497

  15. Remove solenoid (18). Remove O-ring seals (19).


    Illustration 17g03506396


    Illustration 18g03506502

  16. Remove sensor (20). Remove O-ring seal (21).


    Illustration 19g03506397


    Illustration 20g03506506

  17. Remove adapter (22). Remove O-ring seal (23).


    Illustration 21g03506398


    Illustration 22g03506513

  18. Remove plug (24). Remove O-ring seal (25).


    Illustration 23g03506399


    Illustration 24g03506514

  19. Remove adapter (26). Remove O-ring seal (27).


    Illustration 25g03506461


    Illustration 26g03506515

  20. Remove sensor (28). Remove O-ring seal (29).

Installation Procedure

  1. Install diesel exhaust fluid manifold (10) in the reverse order of removal.

    1. Use Tooling (A) to lubricate the O-ring seals.

    2. Tighten sensor (28) to a torque of 48 ± 5 N·m (35 ± 4 lb ft).

    3. Tighten sensor (20) to a torque of 20 ± 3 N·m (177 ± 27 lb in).

    4. Tighten solenoid (18) to a torque of 60 ± 5 N·m (44 ± 4 lb ft).

    5. Tighten solenoid (12) to a torque of 60 ± 5 N·m (44 ± 4 lb ft).

    6. Apply Tooling (B) to the threads of diesel exhaust fluid screen (11) and install diesel exhaust fluid screen (11) with the arrow pointing towards the dosing cabinet.

Information System: